ENS 40572: Difference between revisions
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| event date = 03/06/2004 21:47 CST | | event date = 03/06/2004 21:47 CST | ||
| last update date = 03/07/2004 | | last update date = 03/07/2004 | ||
| title = Plant Had | | title = Plant Had a Loss of Power to the Startup Transformer and the "B" Train 4.16Kv Esfas Bus. | ||
| event text = On 03/06/2004 at 2147 CDT Wolf Creek Generating Station experienced a loss of the west bus in the switchyard causing a loss of power to the Startup Transformer and the "B" Train 4.16 KV ESFAS bus, NB02. The "B" Emergency Diesel Generator started and loaded, as expected, upon the loss of power from the Startup Transformer. All systems and equipment operated as expected for a loss of power to NB02. Reactor power was lowered by the control room staff following the expected start of the steam driven aux. feedwater pump to maintain reactor thermal power below license limits. The cause of the loss of power appears to be the failure of one of the 13.8 KV output bushings on the Startup Transformer. System Operations has dispatched a line crew to the Wolf Creek switchyard to investigate and initiate repair activities. System Operations has reported that all three (3) lines to Wolf Creek are energized and have proper voltage. The plant also entered a 72 hour LCO action statement due to the loss of the power source. | | event text = On 03/06/2004 at 2147 CDT Wolf Creek Generating Station experienced a loss of the west bus in the switchyard causing a loss of power to the Startup Transformer and the "B" Train 4.16 KV ESFAS bus, NB02. The "B" Emergency Diesel Generator started and loaded, as expected, upon the loss of power from the Startup Transformer. All systems and equipment operated as expected for a loss of power to NB02. Reactor power was lowered by the control room staff following the expected start of the steam driven aux. feedwater pump to maintain reactor thermal power below license limits. The cause of the loss of power appears to be the failure of one of the 13.8 KV output bushings on the Startup Transformer. System Operations has dispatched a line crew to the Wolf Creek switchyard to investigate and initiate repair activities. System Operations has reported that all three (3) lines to Wolf Creek are energized and have proper voltage. The plant also entered a 72 hour LCO action statement due to the loss of the power source. | ||
The licensee notified the NRC Resident Inspector. | The licensee notified the NRC Resident Inspector. | ||
Latest revision as of 21:24, 1 March 2018
| Where | |
|---|---|
Wolf Creek  Kansas (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(iv)(A), System Actuation | |
| Time - Person (Reporting Time:+-3.55 h-0.148 days <br />-0.0211 weeks <br />-0.00486 months <br />) | |
| Opened: | Rick Hubbard 00:14 Mar 7, 2004 |
| NRC Officer: | Chauncey Gould |
| Last Updated: | Mar 7, 2004 |
| 40572 - NRC Website
| |